Wă'ter-dŏg, n.

n. 1. A dog accustomed to the water; especially, a variety of the common dog, generally of a black color, with some white, remarkable for its aquatic habits, which render it valuable to sportsmen. Bell.

2. A small floating cloud, supposed to indicate rain. Forby.
3. A sailor. [Collog.]
4. A kind of salamander, with smooth, shining, naked skin;—called also water-puppy. [Local U. S.] Bartlett.